为什么我不断收到位置参数错误? [英] Why do I keep getting a positional argument error?

问题描述

有人可以向我解释为什么我不断收到此错误:TypeError: get_n_nouns() 需要 1 个位置参数，但给出了 2 个.

Can someone please explain to me why I keep getting this error: TypeError: get_n_nouns() takes 1 positional argument but 2 were given.

我已经通过查看类似的问题(链接) 但是我已经根据答案调整了我的代码，但最终还是出现了上述错误.

I have already had a look at where my problem may be by looking at a similar question (Link) But I have adapted my code going along with the answer and yet I end up with the above error.

这里是完整的错误:

Traceback (most recent call last):
  File "C:/Users/...../Downloads/Comp4.1/trialTo3.py", line 21, in <module>
    app.createPhrases()
  File "C:/Users/...../Downloads/Comp4.1/trialTo3.py", line 15, in createPhrases
    words = self.get_n_nouns(1)
TypeError: get_n_nouns() takes 1 positional argument but 2 were given

代码如下:

import csv

class apps():
    def get_n_nouns(n):
        """
        Returns the n most common nouns
        """
        with open("setPhrases.txt") as in_file:
            reader = csv.reader(in_file)
            data = [[row[0], int(row[1])] for row in list(reader)]

        return sorted(data, key=lambda x: -x[1])[:n]

    def createPhrases(self):
        words = self.get_n_nouns(1)
        for word, count in words:
            print("{}: {}".format(word, count))


app = apps()
app.createPhrases()

有人可以向我解释我哪里出错了吗?非常感谢任何帮助.

Can someone please explain to me where I am going wrong? Any help is much appreciated.

推荐答案

好的，我找到了错误所在.有点菜鸟错误.

Ok so I found out where the error was. Kind of a rookie error.

这个:

def get_n_nouns(n):

需要这样写:

def get_n_nouns(self, n):

我忘记添加 self 部分.这就是我不断收到错误消息的原因.

I had forgot to add the self part to it. That is why I kept getting that error message.

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